Tweet of the Day is a series of fascinating stories about our British birds inspired by their calls and songs.
David Attenborough presents the purple sandpiper. On winter beaches, where waves break on seaweed-covered rocks, purple sandpipers make their home. 'Purple' refers to the hint of a purple sheen on their back feathers. They are well camouflaged among the seaweed covered rocks and being relatively quiet, compared to many waders, are easy to overlook.